Buggy code:
protected void checkNamespace ( String uri ) { } } public static class RootHandler extends DefaultHandler { private Stack antHandlers = new Stack ( ) ; private ProjectHelper2 . AntHandler currentHandler = null ; private AntXMLContext context ; public RootHandler ( AntXMLContext context , ProjectHelper2 . AntHandler rootHandler ) { } public ProjectHelper2 . AntHandler getCurrentAntHandler ( ) { } public InputSource resolveEntity ( String publicId , String systemId ) { } public void startElement ( String uri , String tag , String qname , Attributes attrs ) throws SAXParseException { } public void setDocumentLocator ( Locator locator ) { } public void endElement ( String uri , String name , String qName ) throws SAXException { } public void characters ( char [ ] buf , int start , int count ) throws SAXParseException { } public void startPrefixMapping ( String prefix , String uri ) { } public void endPrefixMapping ( String prefix ) { } } public static class MainHandler extends ProjectHelper2 . AntHandler { public ProjectHelper2 . AntHandler onStartChild ( String uri , String name , String qname , Attributes attrs , AntXMLContext context ) throws SAXParseException { } } public static class ProjectHandler extends ProjectHelper2 . AntHandler { public void onStartElement ( String uri , String tag , String qname , Attributes attrs , AntXMLContext context ) throws SAXParseException { String baseDir = null ; boolean nameAttributeSet = false ; Project project = context . getProject ( ) ; context . getImplicitTarget ( ) . setLocation ( new Location ( context . getLocator ( ) ) ) ; for ( int i = 0 ; i < ( attrs . getLength ( ) ) ; i ++ ) { String attrUri = attrs . getURI ( i ) ; if ( ( ( attrUri != null ) && ( ! ( attrUri . equals ( "" ) ) ) ) && ( ! ( attrUri . equals ( uri ) ) ) ) { continue ; } String key = attrs . getLocalName ( i ) ; String value = attrs . getValue ( i ) ; if ( key . equals ( "default" ) ) { if ( ( value != null ) && ( ! ( value . equals ( "" ) ) ) ) { if ( ! ( context . isIgnoringProjectTag ( ) ) ) { project . setDefault ( value ) ; } } } else if ( key . equals ( "name" ) ) { if ( value != null ) { context . setCurrentProjectName ( value ) ; nameAttributeSet = true ; if ( ! ( context . isIgnoringProjectTag ( ) ) ) { project . setName ( value ) ; project . addReference ( value , project ) ; } } } else if ( key . equals ( "id" ) ) { if ( value != null ) { if ( ! ( context . isIgnoringProjectTag ( ) ) ) { project . addReference ( value , project ) ; } } } else if ( key . equals ( "basedir" ) ) { if ( ! ( context . isIgnoringProjectTag ( ) ) ) { baseDir = value ; } } else { throw new SAXParseException ( ( ( "Unexpected<seq2seq4repair_space>attribute<seq2seq4repair_space>\"" + ( attrs . getQName ( i ) ) ) + "\"" ) , context . getLocator ( ) ) ; } } String antFileProp = "ant.file." + ( context . getCurrentProjectName ( ) ) ; String dup = project . getProperty ( antFileProp ) ; if ( ( dup != null ) && nameAttributeSet ) { File dupFile = new File ( dup ) ; if ( ( context . isIgnoringProjectTag ( ) ) && ( ! ( dupFile . equals ( context . getBuildFile ( ) ) ) ) ) { project . log ( ( ( ( ( ( "Duplicated<seq2seq4repair_space>project<seq2seq4repair_space>name<seq2seq4repair_space>in<seq2seq4repair_space>import.<seq2seq4repair_space>Project<seq2seq4repair_space>" + ( context . getCurrentProjectName ( ) ) ) + "<seq2seq4repair_space>defined<seq2seq4repair_space>first<seq2seq4repair_space>in<seq2seq4repair_space>" ) + dup ) + "<seq2seq4repair_space>and<seq2seq4repair_space>again<seq2seq4repair_space>in<seq2seq4repair_space>" ) + ( context . getBuildFile ( ) ) ) , MSG_WARN ) ; } } <START_BUG> if ( ( context . getBuildFile ( ) ) != null ) { <END_BUG> project . setUserProperty ( ( "ant.file." + ( context . getCurrentProjectName ( ) ) ) , context . getBuildFile ( ) . toString ( ) ) ; } if ( context . isIgnoringProjectTag ( ) ) { return ; } if ( ( project . getProperty ( "basedir" ) ) != null ) { project . setBasedir ( project . getProperty ( "basedir" ) ) ; } else { if ( baseDir == null ) { project . setBasedir ( context . getBuildFileParent ( ) . getAbsolutePath ( ) ) ; } else { if ( new File ( baseDir ) . isAbsolute ( ) ) { project . setBasedir ( baseDir ) ; } else { project . setBaseDir ( ProjectHelper2 . FILE_UTILS . resolveFile ( context . getBuildFileParent ( ) , baseDir ) ) ; } } } project . addTarget ( "" , context . getImplicitTarget ( ) ) ; context . setCurrentTarget ( context . getImplicitTarget ( ) ) ; } public ProjectHelper2 . AntHandler onStartChild ( String uri , String name , String qname , Attributes attrs , AntXMLContext context ) throws SAXParseException { } } public static class TargetHandler extends ProjectHelper2 . AntHandler { public void onStartElement ( String uri , String tag , String qname , Attributes attrs , AntXMLContext context ) throws SAXParseException { String name = null ; String depends = "" ; Project project = context . getProject ( ) ; Target target = new Target ( ) ; target . setProject ( project ) ; target . setLocation ( new Location ( context . getLocator ( ) ) ) ; context . addTarget ( target ) ; for ( int i = 0 ; i < ( attrs . getLength ( ) ) ;

Fix:
if ( ( ( context . getBuildFile ( ) ) != null ) && nameAttributeSet ) {